Cool poster, it’s too bad that it is so out of date! There are a lot of cool rockets that could be added. Two that come to mind would be the Space X Falcon 1 (successful launches last year), at ~22m high, would come in about halfway through the 3rd row. Space X’s larger rocket, the Falcon 9, which achieved LEO in June (http://www.spacex.com/F9-001.php), at ~55m high, would come in on the bottom row, between the Proton, USSR and the Space Shuttle, USA. Amazing how far private industry spacecraft have come since this poster was made, back when it was dominated by government projects. How long until we build something bigger than the venerable Saturn V?